Professional Soldiers ® - View Single Post - Horrigan Fighter pictures after some heavy use

**Bill Harsey** · 10-01-2008, 08:23

Debo,
Thanks.
440C has the highest carbon content of the 440 series of martensitic stainless steels and is often used for knives.
I have always thought that the 440C can make a good knife when heat treated correctly. This steel has been used here in the past but not since having the liquid nitrogen capability for freeze treating. This would make the heat treat of the 440C better.
Years ago this alloy got a bad reputation when some in industry didn't get the heat treat right or didn't think it important enough to try. This would have had the same bad result for any steel they used.

If John is doing the work, I know without asking that the heat treat is right.

The knife steels here are 154CM, CPM S-30V and CPM 154. All are made by Crucible Specialty Tool Steels in the USA.

10-01-2008, 08:23	#7
Bill Harsey Bladesmith to the Quiet Professionals Join Date: Feb 2004 Location: Oregon, Land of the Silver Grey Sunsets Posts: 3,886	Debo, Thanks. 440C has the highest carbon content of the 440 series of martensitic stainless steels and is often used for knives. I have always thought that the 440C can make a good knife when heat treated correctly. This steel has been used here in the past but not since having the liquid nitrogen capability for freeze treating. This would make the heat treat of the 440C better. Years ago this alloy got a bad reputation when some in industry didn't get the heat treat right or didn't think it important enough to try. This would have had the same bad result for any steel they used. If John is doing the work, I know without asking that the heat treat is right. The knife steels here are 154CM, CPM S-30V and CPM 154. All are made by Crucible Specialty Tool Steels in the USA.
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